100% CPU Usage

Recently my webserver hanged few times in a week. After login into server to troubleshoot, found out the two lshttpd processes was 100% CPU utilised (refer attachment). Checked the access.log and error.log but seems like nothing unusual. After i excecute ./lswctrl stop and start again, it's seems like back to normal. Any advise?

I'm using Litespeed Web Server Enterprise v4.0.13 on CentOS, running HTTP and HTTPS with Tomcat and PHP and equipped with 2Mbps dedicated international bandwidth.

Attached Files:

strace does not tell us what code causes the infinity looping, can you please download a debug build of LSWS then use GDB to attach to it, then use command "bt" to get callback stack trace. Please contact bug@litespeedtech... for the debug build of LSWS.

Usually after one lshttpd process is 100% CPU usage, I'm no longer able to access the Litespeed's admin web control panel and after a while (few minutes? few hours?) the 2nd lshttpd process will also reached 100% CPU usage and caused the web server hanged.

From the gdb command, found this strange message "/home/gwang/release/httpd/httpd/extensions/jk/jconn.cpp: No such file or directory"